Abstract
We investigated the use of India ink as an indicator of root canal sealing ability. Sealing ability is one of the most important factors required of root canal cements. Various dyes have been used for this purpose. Methylene blue, radioisotopes and India ink have all been tried. However, there is no evidence that India ink is suitable as an indicator. We measured the particle size distribution of India ink to determine how this factor affects test results. In addition, we observed the surface texture of an experimentally developed calcium phosphate sealer and a commercially available root canal sealer using SEM. We found that a portion of the India ink particles were smaller than cracks on the two sealer surfaces, indicating, that India ink could pass through these cracks. We concluded that India ink is suitable as an indicator of root canal seal.
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